YamlNav

yaml_nav.rb

require 'psych'
require 'pathname'

# Hash-like access to objects stored in yaml files in directory structures.
#
# Examples: 
#  CONFIGS = YamlNav.new(Rails.root + "config")
#
#  CONFIGS["exceptional.yml"]["api-key"]
#  # => the api-key stored in config/exceptional.yml
#
#  CONFIGS["foo"]["bar"]["nonexistent.yml"]["baz"]
#  # raises (Errno::ENOENT: No such file or directory config/foo/bar/nonexistent.yml)
class YamlNav
  def initialize(path)
    @pathname = Pathname.new(path)
  end

  def [](base)
    pathname_base = @pathname + base
    pathname_base.extname == ".yml" ? Psych.load_file(pathname_base) : self.class.new(pathname_base)
  end
end